Client-Side WebMCP & RFC 9727 Agent Discovery

if (typeof navigator !== "undefined" && "modelContext" in navigator) {
  (navigator as any).modelContext.registerTool({
    name: "open_course_lesson",
    description: "Navigate directly to a CodingCat.dev course lesson by slug",
    inputSchema: {
      type: "object",
      properties: { courseSlug: { type: "string" }, lessonSlug: { type: "string" } },
      required: ["courseSlug", "lessonSlug"],
    },
    execute: async ({ courseSlug, lessonSlug }: { courseSlug: string; lessonSlug: string }) => {
      window.location.href = `/course/${courseSlug}/lesson/${lessonSlug}`;
      return { navigated: true };
    },
  });
}